Marcus Christopher Gilbert (born February 15, 1988) is a former American football offensive tackle who played in the National Football League for 10 seasons. He played college football for the University of Florida, and was a member of a BCS National Championship team. He was drafted by the Pittsburgh Steelers in the second round of the 2011 NFL Draft and played for the Steelers for eight seasons. Gilbert was also a member of the Arizona Cardinals for two seasons, although he never played a game for the team.